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martedì 22 novembre 2011

Garanzia di Uptime

Avaibility

([Number of minutes in a year - downtime] / [Number of minutes in a year]) * 100 = % of avaibility

ex. ([525600 - 15] / [525600]) * 100 = 99.9971

99% - 5256 Min/Yr o 87.6 Hours/Yr - 438 minuti/mese o 7.3 ore/mese
99.5% - 2628 Min/Yr o 43.8 Hours/Yr - 219 minuti/mese o 3.65 ore/mese
99.9% - 525.6 Min/Yr o 8.76 Hours/Yr - 43.8 minuti/mese o .73 ore/mese
99.95% - 262.8 Min/Yr o 4.38 Hours/Yr - 21.9 minuti/mese o .365 ore/mese
99.99% - 52.56 Min/Yr o .876 Hours/Yr - 4.38 minuti/mese o .073 ore/mese

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